Army Looking To Replace The M4 - Page 2
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Thread: Army Looking To Replace The M4

  1. #11
    Whatever the new rifle is, it should use the 6.8mm cartridge.

    -Doc

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  3. #12
    Quote Originally Posted by lukem View Post
    I just read this article about the Army, after 50 years, is now looking to replace the M4. Looks like they are going to pick it after an "industry day" on March 30 when they are going to be doing some testing. Definitely will be interesting to see what they pick.

    The article I read is here.
    The U.S. military is looking "strongly" into the 6.8 caliber that has and is literally being field tested in our ventures abroad. The 6.8 is smaller than the .223/5.56, therefore more ammo could be carried into action per solider, it's carries far more kinetic force than the ak-47's 7.62mm rounds making it the most deadly round out there in the small arms calibers.

  4. Quote Originally Posted by TangoDown View Post
    The U.S. military is looking "strongly" into the 6.8 caliber that has and is literally being field tested in our ventures abroad. The 6.8 is smaller than the .223/5.56, therefore more ammo could be carried into action per solider, it's carries far more kinetic force than the ak-47's 7.62mm rounds making it the most deadly round out there in the small arms calibers.
    Sorry TangoDown, don't mean to be rude, just correcting what you said bout the 6.8 being smaller than the 5.56. Its actually a little bigger, comparible to the hunting round .270. If they use the same system, they would be able to load 26 rounds into the standard M4 magazine. That being said, its a fantastic round. Faster, flatter shooting than the 5.56, with a heavier bullet for more knock down, which is exactly what our boys need over there.

  5. #14
    handgonnetoter Guest
    Quote Originally Posted by lukem View Post
    I just read this article about the Army, after 50 years, is now looking to replace the M4. Looks like they are going to pick it after an "industry day" on March 30 when they are going to be doing some testing. Definitely will be interesting to see what they pick.

    The article I read is here.
    I read two different articles, from two different gun magazines, that said they were going to replace the M4 with the SCAR. I'm just going off what I read within the last month or so. I guess we will see - its about time to replace the M4 anyway, and its caliber. JMHO.

  6. The issue with the M4 is that they shortened the barrel and that caused a reduction in velocity. The 5.56mm round relies on velocity to get the job done. It's got to do so, because the bullet weight is so light. Slow the 5.56mm down far enough and the bullet just doesn't have enough velocity to get the job done. They pretty much HAD to come up with something different ammunition wise because the 5.56mm is incompatible with what they need to do in the size gun they need to field.

    The new rounds that have been developed for the platform like the various 6.8mm rounds use a heavier bullet at a slightly lower velocity than the 5.56mm, BUT, the heavier bullet maintains it's momentum because it is heavier and is more stable in flight because it is longer and more aerodynamic in design.

    There's two ways to get penetration, mass and velocity. Heavy bullets retain their momentum longer (a body in motion tends to stay in motion) and light, really fast bullets like the 5.56mm have more velocity to shed, so it takes them longer to come to a stop. Look back into history for examples of this. The old big bore Sharps Buffalo gun loads maxed out at around only 1800fps velocity but threw 300gr (.45-70 carbine load) or heavier bullets. Bear in mind, these bullets were relatively soft lead alloys- no jackets or gaschecks- and weren't spire pointed like modern era designs but they were capable of shooting THROUGH large game animals like bison and hitting targets at what is still considered extreme ranges today (ie., Billy Dixon's open sight, 7/8 of a mile kill shot at Adobe Walls with a stock '74 Sharps .50-90 'Business Rifle').

    Look at what J D Jarrett did in the development of the subsonic .300 Whisper loads and you'll see another extreme example of what I mean. The heaviest bullets (up to a 250gr bullet) are designed for very low drag and are fired at a subsonic muzzle velocity, yet are accurate at long ranges and capable of being suppressed to a level similar to subsonic pistol rounds.

  7. #16
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    the only real down fall tot he M4 is the chambering and its operating system. simply upgrading it to a gas piston operating system and either 6.8 or 7.62 will solve pretty much all of its problems. but then again, they would be admitting that there is a problem with the m4.

    What I see happening from this is the DoD will spend a huge chunk of money, then just upgrade the existing M4's yet again. They will not want to spend the money to replace them, and all of the stock of parts and 5.56 ammo-much less have to start over with ammo development..

    the only reason SFOD-A, SFOD-D, 75th Rangers are using different weapons is because they fall under JSOC and SOCOM and do not have to follow big Army rules.

  8. #17
    It seems likely that whatever choice it will end up being it will be a gas piston design. The kinks are worked out and you just can't beat the reliability. Isn't the Bushmaster ACR pretty much tailored for the next US battle rifle?

  9. #18
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    so is the FN SCAR, which is already in service and is versatile enough for the rest of the army.

    this big thing is switching to the FN SCAR or the Bushmaster ACR will cost 2x what it would cost to upgrade the M4 to gas piston AND a larger caliber

  10. #19
    No more foreign made weapons in the US Army!

    Keep the defense dollars here!

    -Doc

  11. #20
    Why not go with the Steyr AUG?

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